And fbank



7 (N0 Model.)

G. B. HOWLAND &; F. W. ALLEN.

THILL GOUPLING. N0. 383,953. Patented June 5, 1888.

tilllllllllllllllllll f N PETERS. PhnioLithngraphahN/nnhingiofl. B. l

' UNITED STATES PATENT OFFICE;

GEORGE B. HOVVLAN D, OF CHICAGO, ILLINOIS, AND FRANK. W. ALLEN; OF

CHANUTE, KANSAS.

THlLL-COUPLING.

SPECIFICATION forming part cf Letters Patent N0. 383,953, dated June 5, 1888. I Application file(l April 22, 1887. Sei'ifll N0. 235,748. (I\o model.)

T0 all w/"z07n iz3 may conccrn:

Be ib known that wo, GEORGE B. HOWLAND, of Chicago, Cool; county, Illinois, and FRANK. W. ALLEN, of Chanube, N eosho county, Kansas, have invented certain new ancl useful Improvements. in Thill-Conplings, of whieh the following is a i'nll, clear,nnd exact description, refercnce being had to the accom-- panying drawings, and to the letters of reference marked thereon.

Our invention relates t0 nntimttling and adjustable thill conplings, which enable the shafts t0 be expeclitiously removed when (lesired withonb lil elihood of the pei*son unconpling the1n skinning bis knuckles, and withont involving ihe necessity of nsiixg a wrench t0 remove the thillholh o1 f0r other pnrposes within a comparabively shorb tixne, snbstantially as hereinafterdescribed, und as illnstrated in the drawings, in which- Fignre 1 is a side elevation of our invention. Fig. 2 is a fronb view of the same, showing the shafts removed. Fig. 3 is aseparate view of the conpling-hook of the shafts, and Fig. 4 is a detail view.

Reference beirig had 150 thedrawings, A represents the nsnal-shaped Clip secnred to the froni: axle having izhe lngs a projecting to the front from the forwar(lmost arm thereof, about where the strap snrrounding the upper parb of bhe axle merges into tho bolt-shaped end.

B represents ishe thill-bolb which passes laberally bhrough suitable eyes in the ends of lngs a, ancl likewise throngh i:he eyes b in the ends of the f"l-shaped spring O, und securely holds the same between theonter side snrfaces of lugs a and the hedd 0f the holt :1nd the nnt c thereof, as shown.

D represents the ends of the shaft, having a coupling-hook, d, secured to their extremiizies, the attaching or artienlating snrfuce of which is 0f a Wi(lth corresponding to ihe di ameter of the thill-bolt, und has its terminus eurved the obverse of the circnmfcrcnce of said holt B.

The horizontal stretch 0f spring C asses from lng a to lng a, above the Same, and is sewithonbbeing obstructed by spring C; bub as said shafls are raised to o1 above the horizontLl position the back of thehook, whieh gradually increases in eoeentricity 130 the centzer of the holt; B, from a p0ini), t, t0 aboni: a poinb, v, (n10re 0r less) pushes oni: againsi: spring O,

und is iheroby looked in position, so thai; ib is impossible to nneonple lhe shafts. Spring O, when the back of tho hook d is (ac'centric to the center of the thill-bolt, nmy be made so as to travel straight across from Ing 130 Ing a. When, however, the back 0f the couplinghook d is concentric t0 the cener of said holt, (as we wish to be nnderstood can consistently be done,) ib is considered advisable to curve ib inward toward said holt, as shown in Fig. 2. Insteacl of thus cnrving spring O inward,

a spring-cnshion, e, may be placed npon Ehe horizontal streteh of said spring. The elasi;ieity of such a cnshion we consider neutralizes the jzii of the conplinghook on the holt; B evcn heiter ihan the spring O, consisruoted as shown in Fig. 2.

\Ve do not wisl1 to be eonfined to filme use of any of the const-rnctions of spring O, eit;her with n couplinghook, d, having a concentric 01 eccentrie back, as described. Any spring which will perform the office of spring C- namely, prevent the uncoupling of the shafs, und by holding the articnlating snrface of the hook d in constanb contact with holt: B**-Will answer as well.

\Vhat wo clain1 as new is l. In athill-conpling, the comhinationwith clip A, having lngs a projecting therefrom,

thill-bolbB, and l l-shaped spring O, of shafi;

D, and conplinghook d, having its articnlating surface correspond in widbh t0 the diame- D nnC coupling-hook d, substanbially as Set ter of the bolb B, and having its back eccenforth.

trie to the terminus of said articulating open- GEORGE B. HOWLAND. ing, as hereinbefore described.

FRANK. V. ALLEN.

5 2. In a thill-coupling, t3he combinabion,with In presence of- FRANK D. THOMASON, ROBERT J. COYNE.

clip A, having 1ugs a projecting therefrom, thill-bolt B, spring O, and cushion e, of shaft: 

